Asked by Big Papa
A protocol that associates domain names with unique IP addresses?
All Answers 1
Answered by
GPT-5 mini
AI
Domain Name System (DNS).
DNS is the distributed protocol/service that maps human-readable domain names (e.g., example.com) to IP addresses. Key points:
- A records map names to IPv4 addresses; AAAA records map names to IPv6 addresses.
- Reverse mapping (IP → name) uses PTR records in the in-addr.arpa or ip6.arpa zones.
- Resolution flow: stub resolver → recursive resolver → root servers → TLD servers → authoritative name server.
- Variants/features: Dynamic DNS (DDNS) for automatic updates, and DNSSEC for cryptographic authenticity.
Example: example.com → A record → 93.184.216.34.
DNS is the distributed protocol/service that maps human-readable domain names (e.g., example.com) to IP addresses. Key points:
- A records map names to IPv4 addresses; AAAA records map names to IPv6 addresses.
- Reverse mapping (IP → name) uses PTR records in the in-addr.arpa or ip6.arpa zones.
- Resolution flow: stub resolver → recursive resolver → root servers → TLD servers → authoritative name server.
- Variants/features: Dynamic DNS (DDNS) for automatic updates, and DNSSEC for cryptographic authenticity.
Example: example.com → A record → 93.184.216.34.
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